211011111022211 has 4 divisors (see below), whose sum is σ = 211012235277624. Its totient is φ = 211009986766800.

The previous prime is 211011111022097. The next prime is 211011111022249. The reversal of 211011111022211 is 112220111110112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211011111022211 - 2³⁸ = 210736233115267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211011111022211.

It is not an unprimeable number, because it can be changed into a prime (211011111024211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561846125 + ... + 562221566.

It is an arithmetic number, because the mean of its divisors is an integer number (52753058819406).

Almost surely, 2^{211011111022211} is an apocalyptic number.

211011111022211 is a deficient number, since it is larger than the sum of its proper divisors (1124255413).

211011111022211 is a wasteful number, since it uses less digits than its factorization.

211011111022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124255412.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 211011111022211 its reverse (112220111110112), we get a palindrome (323231222132323).

The spelling of 211011111022211 in words is "two hundred eleven trillion, eleven billion, one hundred eleven million, twenty-two thousand, two hundred eleven".